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Astronomy Unit Study Guide Test Date: Friday March 6th Unit One: Lesson One - Structure of the Universe (pages 4 – 13) Key Terms: solar system planet star galaxy light-year universe Review questions: **What is the order of the planets in our solar system? (from the sun) What is the order of objects in the universe by size? What is a galaxy? What is the name of our galaxy? **What are the differences and similarities of the inner and outer planets? Unit Three: Lesson One – Earth’s Days, Years, and Seasons (pages 140 – 149) Key Terms: Astronomy Axis Rotation Revolution Orbit Latitude Solstice Equinox Year Day Indirect light Direct light Vernal Equinox Autumnal Equinox Winter solstice Summer solstice Season Longitude Review Questions: What causes day & night? **What causes the seasons? What are the characteristics of each season? What is the tilt of Earth’s axis? **When does the Northern Hemisphere get the most/least direct sunlight? **When does the Southern Hemisphere get the most/least direct sunlight? **What is the difference between a solstice and an equinox? **What is the relative position of the Earth around the sun at each season and the relative amount of daylight hours and temperatures? What is the position of the Earth around the sun during equinoxes and solstices? Unit 3: Lesson 2: Phases and Eclipses (pages 152 – 161) Key Terms: Phase Eclipse Solar Eclipse Umbra Crescent Gibbous Waxing Waning Full moon New moon Penumbra Lunar Eclipse Review Questions: What causes the phases of the moon and eclipses? **How long does it take the moon to go through a cycle of phases? Why do we only see one side of the moon? How long is the moon’s rotation/revolution? **What is the relative location of the moon around the Earth at each phase? Can you name and describe each phase??? What is the relative location of the moon during a lunar and solar eclipse? **What is the difference between a solar and lunar eclipse? **Why are you more likely to see a lunar eclipse than a solar eclipse? WHAT CAN YOU USE FOR STUDYING? Textbook Notes Handouts Previous quizzes Do Now questions Remember, all the questions listed under “Review Questions” will not necessarily be on the test. Also, some questions on the test will refer to the topics listed above, but not be worded exactly as those listed above. Please see me if you have any questions. STUDY HARD!!